Environmental

Radon is a significant environmental concern in Iowa because:

AIowa has no radon issues due to flat terrain
BIowa ranks among the highest states for elevated indoor radon levels due to underlying geology✓ Correct
CRadon only affects properties near rivers
DIowa state law has banned all radon testing

Explanation

Iowa consistently ranks as one of the states with the highest rates of elevated indoor radon concentrations. The geology (glacial till and uranium-rich soils) contributes to elevated radon, and Iowa encourages testing and mitigation for all homes.

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